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Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income before income taxes: |  |  |  |  |  |  |  |  |  |  |
Domestic |  |  |  |  |  |  |  |  | $ 32,907 | $ 36,657 | $ 35,088
Foreign |  |  |  |  |  |  |  |  | 32,151 | 15,925 | 4,097
Income before income taxes |  |  |  |  |  |  |  |  | 65,058 | 52,582 | 39,185
Provision for income taxes: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 2,370 | 2,478 | 760
State and foreign |  |  |  |  |  |  |  |  | 6,288 | 11,014 | 2,575
Total current expense (benefit) |  |  |  |  |  |  |  |  | 8,658 | 13,492 | 3,335
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 3,788 | (2,585) | (37,828)
State and foreign |  |  |  |  |  |  |  |  | (1,236) | (3,374) | (1,896)
Total deferred benefit |  |  |  |  |  |  |  |  | 2,552 | (5,959) | (39,724)
Income Tax Expense (Benefit), Total | $ 690 | $ 3,467 | $ 3,820 | $ 3,233 | $ (6,036) | $ 3,809 | $ 5,189 | $ 4,571 | $ 11,210 | $ 7,533 | $ (36,389)

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- Definition The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law and foreign tax law to relevant amounts of taxable Income or Loss from continuing operations. + References No definition available. + Details
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